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#!/bin/sh
[ -d "$1" ] || exit 1 # Exit with error if not pointing to a directory
# Misc
duration() { ffprobe -i "$1" -show_entries format=duration -v quiet -of csv="p=0" | tr -d . ; }
timebase="1/1000000" # duration function gives microseconds
safename() { echo "$1" | tr -d '<>:"/\|?*' ; }
# Temp dirs
workdir="$(mktemp -d "${TMPDIR:-/tmp}/combinetapesworkdir.XXXXXX")"
cleanup() { rm -rf "$workdir" ; }
trap cleanup EXIT INT HUP QUIT TERM ALRM USR1
# Loop vars
current_date=0
duration_total=0
chapter_start=0
chapter_time=0
last_chapter_concurrent=0
# TODO this relys on the for loop looping in order
# Either can be ran on single dv containing directory, or many dv containing directories
for dir in "$1"/ "$1"/*/; do
dir="${dir%/}" # Remove trailing slash
title=""
if [ "$dir" != "$1" ]; then
title="$(basename "$dir")"
fi
if echo "$dir" | grep '/\*' >/dev/null; then
break
fi
for tape in "$dir"/*.dv; do
date="$(echo "$(basename "$tape")" | grep -o '[0-9]*\.[0-9]*\.[0-9]*' | tr '.' '-')"
time="$(echo "$(basename "$tape")" | grep -o '[0-9]*-[0-9]*-[0-9]*' | tr '-' ':')"
if [ "$title$date" != "$current_date" ]; then
# Reset vars
current_date="$title$date"
duration_total=0
chapter_start=0
chapter_time=0
last_chapter_concurrent=0
# Create dirs
date_dir="$workdir/$current_date"
mkdir -p "$date_dir"
files="$date_dir/files"
chapters="$date_dir/chapters"
# Init chapters file
printf ";FFMETADATA1\n\n" > "$chapters"
# title file
if [ "$title" ]; then
echo "$title" > "$date_dir/title"
fi
fi
# Concat files
echo "file '$(realpath "$tape" | sed "s/'/'\\\\''/g")'" >> "$files"
# Chapter marker
tape_duration=$(duration "$tape" | grep -o "[1-9][0-9]*")
duration_total=$(( $duration_total + $tape_duration ))
# Only insert chapter marker if recordings are not concurrent. dvgrab
# splits files into 1gb chunks, or 291557933 microseconds of raw dv footage
# (with digital 8)
if [ $last_chapter_concurrent = 0 ]; then
chapter_time=$time
fi
if [ $tape_duration = 291557933 ]; then
last_chapter_concurrent=1
continue
else
last_chapter_concurrent=0
fi
echo "[CHAPTER]" >> "$chapters"
echo "TIMEBASE=$timebase" >> "$chapters"
echo "START=$chapter_start" >> "$chapters"
echo "END=$duration_total" >> "$chapters"
echo "title=Section starts at $chapter_time" >> "$chapters"
echo >> "$chapters"
chapter_start=$duration_total
done
done
# ffmpeg combine
out_dir=export
default_title=Untitled
mkdir -p "$out_dir"
for date_dir in "$workdir"/*; do
date="$(echo "$date_dir" | grep -o "[0-9][0-9][0-9][0-9]-[0-9]*-[0-9]*")"
origin_tape="$(basename "$1")"
# Files
title="$date_dir/title"
files="$date_dir/files"
chapters="$date_dir/chapters"
# Nicely title
if [ -e "$title" ]; then
# title file
output_title="$(cat "$title")"
#elif echo "$origin_tape" | grep "^[^0-9].*[0-9]*-[0-9]*-[0-9]*" >/dev/null; then
# # Beginning descriptor
# output_title="$(echo "$origin_tape" | sed 's/ [0-9#].*//')"
#elif echo "$origin_tape" | grep "$date [A-Z]" >/dev/null; then
# # Date range or list of dates with titles (Title must be capitalized, 'to' must be made lowercase
# output_title="$(echo "$origin_tape" | sed "s/.*$date //; s/ to [0-9].*//; s/;.*//")"
else
# default
output_title=$default_title
fi
output_title="$(echo "$output_title" | sed 's/\s*#[0-9]*$//')" # Remove sequence numbers
# File name
if [ "$output_title" = "$default_title" ]; then
output_name="$date"
else
output_name="$date $output_title"
fi
if [ -e "$out_dir/$output_name.mp4" ]; then
output=$(ls "$out_dir" | grep "$output_name *[0-9]*.mp4" | while read -r file; do
file_tape="$(mediainfo "$out_dir/$file" | sed -n 's/Comment.* - Origin tape: //p')"
if [ "$origin_tape" = "$file_tape" ]; then
echo 0
break
fi
done)
if [ "$output" = 0 ]; then
continue
fi
output_name="$output_name $(ls "$out_dir" | grep "$output_name *[0-9]*.mp4" | wc -l)"
fi
# Convert
#-c copy \
#-metadata "title=$output_title" \ # Dont set title since it will be stuck if file is renamed
ffmpeg -hide_banner -nostdin \
-n \
-f concat -safe 0 -i "$files" \
-i "$chapters" -map_metadata 1 \
-c:v libx264 -crf 22 -preset medium -tune grain \
-vf yadif \
-c:a aac -b:a 320k \
-metadata "date=$date" \
-metadata "comment=tapes.tjkeller.xyz - Origin tape: $origin_tape" \
"$out_dir/$output_name.mp4"
#"$out_dir/$output_name.mkv"
done
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